diff --git a/test/python-black-check.sh b/test/python-black-check.sh
index 7a6fd0ab..2861047e 100755
--- a/test/python-black-check.sh
+++ b/test/python-black-check.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 if [ -z "$MESON_SOURCE_ROOT" ]; then
-	echo "Expected \$MESON_SOURCE_ROOT to be set. Are you sure you are running this through ninja?"
+	echo >&2 "Expected \$MESON_SOURCE_ROOT to be set. Are you sure you are running this through ninja?"
 	exit 100
 fi
 
@@ -9,7 +9,7 @@ cd "$MESON_SOURCE_ROOT" || exit 101
 
 files=$(git ls-files "*.py" "*.py.in")
 if [ -z "$files" ]; then
-	echo "Git didn't find any files"
+	echo >&2 "Git didn't find any files"
 	exit 77
 fi
 
diff --git a/test/python-ruff-check.sh b/test/python-ruff-check.sh
index 0d726702..fa2f7f2d 100755
--- a/test/python-ruff-check.sh
+++ b/test/python-ruff-check.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 if [ -z "$MESON_SOURCE_ROOT" ]; then
-	echo "Expected \$MESON_SOURCE_ROOT to be set. Are you sure you are running this through ninja?"
+	echo >&2 "Expected \$MESON_SOURCE_ROOT to be set. Are you sure you are running this through ninja?"
 	exit 100
 fi
 
@@ -9,7 +9,7 @@ cd "$MESON_SOURCE_ROOT" || exit 101
 
 files=$(git ls-files "*.py" "*.py.in")
 if [ -z "$files" ]; then
-	echo "Git didn't find any files"
+	echo >&2 "Git didn't find any files"
 	exit 77
 fi
 
diff --git a/tools/python-black.sh b/tools/python-black.sh
index e80a9d95..748099b8 100755
--- a/tools/python-black.sh
+++ b/tools/python-black.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 if [ -z "$MESON_SOURCE_ROOT" ]; then
-	echo "Expected \$MESON_SOURCE_ROOT to be set. Are you sure you are running this through ninja?"
+	echo >&2 "Expected \$MESON_SOURCE_ROOT to be set. Are you sure you are running this through ninja?"
 	exit 100
 fi
 
@@ -9,7 +9,7 @@ cd "$MESON_SOURCE_ROOT" || exit 101
 
 files=$(git ls-files "*.py" "*.py.in")
 if [ -z "$files" ]; then
-	echo "Git didn't find any files"
+	echo >&2 "Git didn't find any files"
 	exit 77
 fi
 
diff --git a/tools/python-ruff.sh b/tools/python-ruff.sh
index 43885b4b..3bd01da8 100755
--- a/tools/python-ruff.sh
+++ b/tools/python-ruff.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 if [ -z "$MESON_SOURCE_ROOT" ]; then
-	echo "Expected \$MESON_SOURCE_ROOT to be set. Are you sure you are running this through ninja?"
+	echo >&2 "Expected \$MESON_SOURCE_ROOT to be set. Are you sure you are running this through ninja?"
 	exit 100
 fi
 
@@ -9,7 +9,7 @@ cd "$MESON_SOURCE_ROOT" || exit 101
 
 files=$(git ls-files "*.py" "*.py.in")
 if [ -z "$files" ]; then
-	echo "Git didn't find any files"
+	echo >&2 "Git didn't find any files"
 	exit 77
 fi